Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f0c93128442045…

MALICIOUS

PDF

75.0 KB Created: 2021-04-20 06:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 860291709896aec075f1a951403837b9 SHA-1: 7d4ffb7964efd0a715f4a1411f38717da05faea6 SHA-256: 07f0c93128442045b447de584f0a19782d478fcfc6164d135c5d65a7f1aee078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, many of which point to suspicious domains, indicating a potential link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/strik?utm_term=hunger+games+mockingjay+part+2+movie+online+free
    • http://kneeksi.ru/81780792028pwo8c.pdf
    • https://zupawifotifawe.weebly.com/uploads/1/3/4/4/134480263/36252d8c9.pdf
    • http://natlab.ru/how_to_operate_primo_water_dispenser6bfps.pdf
    • http://worldworkbook.com/factorization_worksheet_with_answersktroy.pdf
    • http://probmake12.xyz/how_to_pair_lg_tone_bluetooth_headset_with_iphonellyno.pdf
    • http://verefdliyvtorogo.xyz/consumer_cellular_doro_7050_batterysdw3o.pdf
    • https://bomazadoxu.weebly.com/uploads/1/3/4/4/134474586/772cd234.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/39b306b0-9976-43ad-899c-4beed121274f/pafirez.pdf
    • https://s3.amazonaws.com/fukepez/felox.pdf
    • https://s3.amazonaws.com/baritexovopa/65592720055.pdf
    • https://uploads.strikinglycdn.com/files/0ab13caa-0b35-4bc8-ac18-977bf692eaac/yamaha_psr_e253_prezzo.pdf
    • https://uploads.strikinglycdn.com/files/db25fd6b-c8fc-440e-9ea5-2efbd0b0d235/borodu.pdf
    • https://s3.amazonaws.com/nedijowewoded/fozogegedebusuvoxip.pdf
    • https://uploads.strikinglycdn.com/files/80639915-e027-4c9c-beca-f25398b1c129/kutodawekodilivukonutep.pdf
    • https://s3.amazonaws.com/ditiruz/describe_the_3_types_of_covalent_bonds.pdf
    • https://uploads.strikinglycdn.com/files/a6ec7964-9ee4-4237-a46c-b631f66d5e1c/lemotisofa.pdf
    • https://s3.amazonaws.com/fuvidokibet/direv.pdf
    • https://s3.amazonaws.com/jopomodilamego/sovexuwofadudigakuki.pdf
    • https://uploads.strikinglycdn.com/files/f07a3a66-52bb-4122-a972-4d4ff1697fc8/anet_computers_epson_workforce_3640_error_code_0x97_fix.pdf
    • https://s3.amazonaws.com/seriposuj/petting_farms_near_me_open_today.pdf
    • https://s3.amazonaws.com/papuja/words_that_start_with_ph.pdf
    • https://uploads.strikinglycdn.com/files/4159aef7-9a77-45de-a9ed-b26378605486/bissell_proheat_2x_revolution_pet_instruction_manual.pdf
    • https://s3.amazonaws.com/kuxuxemu/meramec_springs_fishing_report.pdf
    • https://uploads.strikinglycdn.com/files/2bcf9695-f3fb-4b7b-b8f3-c6d975a41ac0/how_much_do_interior_designers_make_a_year_in_canada.pdf
    • https://s3.amazonaws.com/wazagidonux/accorhotels_group_annual_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38b.bin
054f4db19a1a94363f2f194c08e4f24e0bec33d392af910f5f3e654ae511ef9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38B 5732 bytes
font_01_sfnt_off0000f721.bin
d2ec55f0d7d53fd8cc618e37b1217e8ce9440423b2dd35397821e8727af11b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 11432 bytes

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